H Social sciences (General)
HA Statistics
HB Economic theory. Demography
HC Economic history and conditions
HD Industries. Land use. Labor
HE Transportation and communications
HF Commerce
HG Finance
HJ Public Finance
HM Sociology
HN Social history and conditions. Social problems. Social
Reform
HQ The family. Marriage. Women.
HS Societies: secret, benevolent, etc.
HT Communities. Classes. Races
HV Social pathology. Social and public welfare.
Criminology
HX Socialism. Communism. Anarchism.
LA History of education
LB Theory and practice of education
LC Special aspects of education
LD Individual institutions - United States
LE Individual institutions - America
(except the United States)
LG Individual institutions - Asia, Africa, Indian
Ocean islands, Australia, New Zealand Pacific islands
LH College and school magazines and papers
LJ Student fraternities and societies, United States
J General legislative and executive papers
JA Political science (General)
JC Political theory
JK Political institutions and public administration
(United States)
JL Political institutions and public administration
(Canada, Latin America, etc.)
JN Political institutions and public administration (Europe)
JQ Political institutions and public administration
(Asia, Africa, Australia, Pacific Area, etc.)
JS Local government. Municipal government
JV Colonies and colonization. Emigration and immigration.
International migration
JX International law, see JZ and KZ
JZ International relations
D History (General)
DA Great Britain
DAW Central Europe
DB Austria - Liechenstein - Hungary - Czechoslovakia
DC France - Andorra - Monaco
DD Germany
DE Greco - Roman World
DF Greece
DG Italy - Malta
DH Low Countries - Benelux Countries
DJ Netherlands
DJK Eastern Europe (General)
DK Russia. Soviet Union. Former Soviet Republics -
Poland
DL Northern Europe. Scandinavia
DP Spain - Portugal
DQ Switzerland
DR Balkan Peninsula
DS Asia
DT Africa
DU Oceania (South Seas)
DX Romanies
K Law om general. Comparative and uniform law.
Jurisprudence
KB Religious law in general. Comparative religious law.
Jurisprudence
KBM Jewish law
KBP Islamic law
KBR History of canon law
KD United Kingdom and Ireland
KDZ America. North America
KE Canada
KF United States
KG Latin America - Mexico and Central America -
West Indies. Caribbean area
KH South America
KJ Europe
KZ Law of nations